<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="vue.js"></script>
</head>
<body>
    <div id="app">
        <parent></parent>
    </div>

    <template id="child">
        <div>
            <button @click="click">Send</button>
            <input type="text" v-model="message">
        </div>
    </template>

    <script>
        Vue.component('parent',{
            template:'<div><child @childFn="transContent"></child>' +
                        '子组件传来的值 : {{message}}</div>',
            data () {
                return {
                    message: ''
                }
            },
            methods: {
                transContent (payload) {
                    this.message = payload
                }
            }
        })
        // child组件
        Vue.component('child',{
            template:'#child',
            data () {
                return {
                    message: '子组件的消息'
                }
            },
            methods:{
                click () {
                    this.$emit('childFn', this.message);
                }
            }
        })
        var vm = new Vue({el:'#app'})
    </script>
</body>
</html>